[p5sagit/p5-mst-13.2.git] / thread.h

#if defined(USE_THREADS) || defined(USE_ITHREADS)

#if defined(VMS)
#include <builtins.h>
#endif

#ifdef WIN32
#  include <win32thread.h>
#else
#  ifdef OLD_PTHREADS_API /* Here be dragons. */
#    define DETACH(t) \
    STMT_START {						\
	if (pthread_detach(&(t)->self)) {			\
	    MUTEX_UNLOCK(&(t)->mutex);				\
	    Perl_croak_nocontext("panic: DETACH");		\
	}							\
    } STMT_END

#    define PERL_GET_CONTEXT	Perl_get_context()
#    define PERL_SET_CONTEXT(t)	Perl_set_context((void*)t)

#    define PTHREAD_GETSPECIFIC_INT
#    ifdef DJGPP
#      define pthread_addr_t any_t
#      define NEED_PTHREAD_INIT
#      define PTHREAD_CREATE_JOINABLE (1)
#    endif
#    ifdef __OPEN_VM
#      define pthread_addr_t void *
#    endif
#    ifdef VMS
#      define pthread_attr_init(a) pthread_attr_create(a)
#      define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
#      define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
#      define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
#      define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
#      define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
#    endif
#    if defined(__hpux) && defined(__ux_version) && __ux_version <= 1020
#      define pthread_attr_init(a) pthread_attr_create(a)
       /* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */
#      define PTHREAD_ATTR_SETDETACHSTATE(a,s)	(0)
#      define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
#      define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
#      define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
#      define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
#    endif
#    if defined(DJGPP) || defined(__OPEN_VM)
#      define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
#      define YIELD pthread_yield(NULL)
#    endif
#  endif
#  if !defined(__hpux) || !defined(__ux_version) || __ux_version > 1020
#    define pthread_mutexattr_default NULL
#    define pthread_condattr_default  NULL
#  endif
#endif

#ifndef PTHREAD_CREATE
/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
#  define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
#endif

#ifndef PTHREAD_ATTR_SETDETACHSTATE
#  define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
#endif

#ifndef PTHREAD_CREATE_JOINABLE
#  ifdef OLD_PTHREAD_CREATE_JOINABLE
#    define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
#  else
#    define PTHREAD_CREATE_JOINABLE 0 /* Panic?  No, guess. */
#  endif
#endif

#ifdef DGUX
#  define THREAD_CREATE_NEEDS_STACK (16*1024)
#endif

#ifdef I_MACH_CTHREADS

/* cthreads interface */

/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */

#define MUTEX_INIT(m) \
    STMT_START {						\
	*m = mutex_alloc();					\
	if (*m) {						\
	    mutex_init(*m);					\
	} else {						\
	    Perl_croak_nocontext("panic: MUTEX_INIT");		\
	}							\
    } STMT_END

#define MUTEX_LOCK(m)			mutex_lock(*m)
#define MUTEX_UNLOCK(m)			mutex_unlock(*m)
#define MUTEX_DESTROY(m) \
    STMT_START {						\
	mutex_free(*m);						\
	*m = 0;							\
    } STMT_END

#define COND_INIT(c) \
    STMT_START {						\
	*c = condition_alloc();					\
	if (*c) {						\
	    condition_init(*c);					\
	}							\
	else {							\
	    Perl_croak_nocontext("panic: COND_INIT");		\
	}							\
    } STMT_END

#define COND_SIGNAL(c)		condition_signal(*c)
#define COND_BROADCAST(c)	condition_broadcast(*c)
#define COND_WAIT(c, m)		condition_wait(*c, *m)
#define COND_DESTROY(c) \
    STMT_START {						\
	condition_free(*c);					\
	*c = 0;							\
    } STMT_END

#define THREAD_CREATE(thr, f)	(thr->self = cthread_fork(f, thr), 0)
#define THREAD_POST_CREATE(thr)

#define THREAD_RET_TYPE		any_t
#define THREAD_RET_CAST(x)	((any_t) x)

#define DETACH(t)		cthread_detach(t->self)
#define JOIN(t, avp)		(*(avp) = (AV *)cthread_join(t->self))

#define PERL_SET_CONTEXT(t)	cthread_set_data(cthread_self(), t)
#define PERL_GET_CONTEXT	cthread_data(cthread_self())

#define INIT_THREADS		cthread_init()
#define YIELD			cthread_yield()
#define ALLOC_THREAD_KEY	NOOP
#define FREE_THREAD_KEY		NOOP
#define SET_THREAD_SELF(thr)	(thr->self = cthread_self())

#endif /* I_MACH_CTHREADS */

#ifndef YIELD
#  ifdef SCHED_YIELD
#    define YIELD SCHED_YIELD
#  else
#    ifdef HAS_SCHED_YIELD
#      define YIELD sched_yield()
#    else
#      ifdef HAS_PTHREAD_YIELD
    /* pthread_yield(NULL) platforms are expected
     * to have #defined YIELD for themselves. */
#        define YIELD pthread_yield()
#      endif
#    endif
#  endif
#endif

#ifdef __hpux
#  define MUTEX_INIT_NEEDS_MUTEX_ZEROED
#endif

#ifndef MUTEX_INIT

#  ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
    /* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
#    define MUTEX_INIT(m) \
    STMT_START {						\
	Zero((m), 1, perl_mutex);                               \
 	if (pthread_mutex_init((m), pthread_mutexattr_default))	\
	    Perl_croak_nocontext("panic: MUTEX_INIT");		\
    } STMT_END
#  else
#    define MUTEX_INIT(m) \
    STMT_START {						\
	if (pthread_mutex_init((m), pthread_mutexattr_default))	\
	    Perl_croak_nocontext("panic: MUTEX_INIT");		\
    } STMT_END
#  endif

#  define MUTEX_LOCK(m) \
    STMT_START {						\
	if (pthread_mutex_lock((m)))				\
	    Perl_croak_nocontext("panic: MUTEX_LOCK");		\
    } STMT_END

#  define MUTEX_UNLOCK(m) \
    STMT_START {						\
	if (pthread_mutex_unlock((m)))				\
	    Perl_croak_nocontext("panic: MUTEX_UNLOCK");	\
    } STMT_END

#  define MUTEX_DESTROY(m) \
    STMT_START {						\
	if (pthread_mutex_destroy((m)))				\
	    Perl_croak_nocontext("panic: MUTEX_DESTROY");	\
    } STMT_END
#endif /* MUTEX_INIT */

#ifndef COND_INIT
#  define COND_INIT(c) \
    STMT_START {						\
	if (pthread_cond_init((c), pthread_condattr_default))	\
	    Perl_croak_nocontext("panic: COND_INIT");		\
    } STMT_END

#  define COND_SIGNAL(c) \
    STMT_START {						\
	if (pthread_cond_signal((c)))				\
	    Perl_croak_nocontext("panic: COND_SIGNAL");		\
    } STMT_END

#  define COND_BROADCAST(c) \
    STMT_START {						\
	if (pthread_cond_broadcast((c)))			\
	    Perl_croak_nocontext("panic: COND_BROADCAST");	\
    } STMT_END

#  define COND_WAIT(c, m) \
    STMT_START {						\
	if (pthread_cond_wait((c), (m)))			\
	    Perl_croak_nocontext("panic: COND_WAIT");		\
    } STMT_END

#  define COND_DESTROY(c) \
    STMT_START {						\
	if (pthread_cond_destroy((c)))				\
	    Perl_croak_nocontext("panic: COND_DESTROY");	\
    } STMT_END
#endif /* COND_INIT */

/* DETACH(t) must only be called while holding t->mutex */
#ifndef DETACH
#  define DETACH(t) \
    STMT_START {						\
	if (pthread_detach((t)->self)) {			\
	    MUTEX_UNLOCK(&(t)->mutex);				\
	    Perl_croak_nocontext("panic: DETACH");		\
	}							\
    } STMT_END
#endif /* DETACH */

#ifndef JOIN
#  define JOIN(t, avp) \
    STMT_START {						\
	if (pthread_join((t)->self, (void**)(avp)))		\
	    Perl_croak_nocontext("panic: pthread_join");	\
    } STMT_END
#endif /* JOIN */

/* Use an unchecked fetch of thread-specific data instead of a checked one.
 * It would fail if the key were bogus, but if the key were bogus then
 * Really Bad Things would be happening anyway. --dan */
#if (defined(__ALPHA) && (__VMS_VER >= 70000000)) || \
    (defined(__alpha) && defined(__osf__)) /* Available only on >= 4.0 */
#  define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */
#endif

#ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP
#  define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key)
#else
#  define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key)
#endif

#ifndef PERL_GET_CONTEXT
#  define PERL_GET_CONTEXT	PTHREAD_GETSPECIFIC(PL_thr_key)
#endif

#ifndef PERL_SET_CONTEXT
#  define PERL_SET_CONTEXT(t) \
    STMT_START {						\
	if (pthread_setspecific(PL_thr_key, (void *)(t)))	\
	    Perl_croak_nocontext("panic: pthread_setspecific");	\
    } STMT_END
#endif /* PERL_SET_CONTEXT */

#ifndef INIT_THREADS
#  ifdef NEED_PTHREAD_INIT
#    define INIT_THREADS pthread_init()
#  endif
#endif

#ifndef ALLOC_THREAD_KEY
#  define ALLOC_THREAD_KEY \
    STMT_START {						\
	if (pthread_key_create(&PL_thr_key, 0))	{		\
	    PerlIO_printf(PerlIO_stderr(), "panic: pthread_key_create");	\
	    exit(1);						\
	}							\
    } STMT_END
#endif

#ifndef FREE_THREAD_KEY
#  define FREE_THREAD_KEY \
    STMT_START {						\
	pthread_key_delete(PL_thr_key);				\
    } STMT_END
#endif

#ifndef THREAD_RET_TYPE
#  define THREAD_RET_TYPE	void *
#  define THREAD_RET_CAST(p)	((void *)(p))
#endif /* THREAD_RET */

#if defined(USE_THREADS)

/* Accessor for per-thread SVs */
#  define THREADSV(i) (thr->threadsvp[i])

/*
 * LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
 * try only locking them if there may be more than one thread in existence.
 * Systems with very fast mutexes (and/or slow conditionals) may wish to
 * remove the "if (threadnum) ..." test.
 * XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions!
 */
#  define LOCK_SV_MUTEX		MUTEX_LOCK(&PL_sv_mutex)
#  define UNLOCK_SV_MUTEX	MUTEX_UNLOCK(&PL_sv_mutex)
#  define LOCK_STRTAB_MUTEX	MUTEX_LOCK(&PL_strtab_mutex)
#  define UNLOCK_STRTAB_MUTEX	MUTEX_UNLOCK(&PL_strtab_mutex)
#  define LOCK_CRED_MUTEX	MUTEX_LOCK(&PL_cred_mutex)
#  define UNLOCK_CRED_MUTEX	MUTEX_UNLOCK(&PL_cred_mutex)
#  define LOCK_FDPID_MUTEX	MUTEX_LOCK(&PL_fdpid_mutex)
#  define UNLOCK_FDPID_MUTEX	MUTEX_UNLOCK(&PL_fdpid_mutex)
#  define LOCK_SV_LOCK_MUTEX	MUTEX_LOCK(&PL_sv_lock_mutex)
#  define UNLOCK_SV_LOCK_MUTEX	MUTEX_UNLOCK(&PL_sv_lock_mutex)

/* Values and macros for thr->flags */
#define THRf_STATE_MASK	7
#define THRf_R_JOINABLE	0
#define THRf_R_JOINED	1
#define THRf_R_DETACHED	2
#define THRf_ZOMBIE	3
#define THRf_DEAD	4

#define THRf_DID_DIE	8

/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
#define ThrSETSTATE(t, s) STMT_START {		\
	(t)->flags &= ~THRf_STATE_MASK;		\
	(t)->flags |= (s);			\
	DEBUG_S(PerlIO_printf(Perl_debug_log,	\
			      "thread %p set to state %d\n", (t), (s))); \
    } STMT_END

typedef struct condpair {
    perl_mutex	mutex;		/* Protects all other fields */
    perl_cond	owner_cond;	/* For when owner changes at all */
    perl_cond	cond;		/* For cond_signal and cond_broadcast */
    Thread	owner;		/* Currently owning thread */
} condpair_t;

#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner

#endif /* USE_THREADS */
#endif /* USE_THREADS || USE_ITHREADS */

#ifndef MUTEX_LOCK
#  define MUTEX_LOCK(m)
#endif

#ifndef MUTEX_UNLOCK
#  define MUTEX_UNLOCK(m)
#endif

#ifndef MUTEX_INIT
#  define MUTEX_INIT(m)
#endif

#ifndef MUTEX_DESTROY
#  define MUTEX_DESTROY(m)
#endif

#ifndef COND_INIT
#  define COND_INIT(c)
#endif

#ifndef COND_SIGNAL
#  define COND_SIGNAL(c)
#endif

#ifndef COND_BROADCAST
#  define COND_BROADCAST(c)
#endif

#ifndef COND_WAIT
#  define COND_WAIT(c, m)
#endif

#ifndef COND_DESTROY
#  define COND_DESTROY(c)
#endif

#ifndef LOCK_SV_MUTEX
#  define LOCK_SV_MUTEX
#endif

#ifndef UNLOCK_SV_MUTEX
#  define UNLOCK_SV_MUTEX
#endif

#ifndef LOCK_STRTAB_MUTEX
#  define LOCK_STRTAB_MUTEX
#endif

#ifndef UNLOCK_STRTAB_MUTEX
#  define UNLOCK_STRTAB_MUTEX
#endif

#ifndef LOCK_CRED_MUTEX
#  define LOCK_CRED_MUTEX
#endif

#ifndef UNLOCK_CRED_MUTEX
#  define UNLOCK_CRED_MUTEX
#endif

#ifndef LOCK_FDPID_MUTEX
#  define LOCK_FDPID_MUTEX
#endif

#ifndef UNLOCK_FDPID_MUTEX
#  define UNLOCK_FDPID_MUTEX
#endif

#ifndef LOCK_SV_LOCK_MUTEX
#  define LOCK_SV_LOCK_MUTEX
#endif

#ifndef UNLOCK_SV_LOCK_MUTEX
#  define UNLOCK_SV_LOCK_MUTEX
#endif

/* THR, SET_THR, and dTHR are there for compatibility with old versions */
#ifndef THR
#  define THR		PERL_GET_THX
#endif

#ifndef SET_THR
#  define SET_THR(t)	PERL_SET_THX(t)
#endif

#ifndef dTHR
#  define dTHR dNOOP
#endif

#ifndef INIT_THREADS
#  define INIT_THREADS NOOP
#endif
Commit	Line	Data
1feb2720	1	#if defined(USE_THREADS) \|\| defined(USE_ITHREADS)
12ca11f6	2
fd8cd3a3	3	#if defined(VMS)
	4	#include <builtins.h>
	5	#endif
	6
ea0efc06	7	#ifdef WIN32
d55594ae	8	# include <win32thread.h>
d55594ae	9	#else
0d85d877	10	# ifdef OLD_PTHREADS_API /* Here be dragons. */
ba869deb	11	# define DETACH(t) \
	12	STMT_START { \
	13	if (pthread_detach(&(t)->self)) { \
	14	MUTEX_UNLOCK(&(t)->mutex); \
efc57feb	15	Perl_croak_nocontext("panic: DETACH"); \
ba869deb	16	} \
ea0efc06	17	} STMT_END
ba869deb	18
	19	# define PERL_GET_CONTEXT Perl_get_context()
	20	# define PERL_SET_CONTEXT(t) Perl_set_context((void*)t)
	21
0d85d877	22	# define PTHREAD_GETSPECIFIC_INT
	23	# ifdef DJGPP
	24	# define pthread_addr_t any_t
	25	# define NEED_PTHREAD_INIT
6dc3770d	26	# define PTHREAD_CREATE_JOINABLE (1)
0d85d877	27	# endif
	28	# ifdef __OPEN_VM
	29	# define pthread_addr_t void *
	30	# endif
	31	# ifdef VMS
	32	# define pthread_attr_init(a) pthread_attr_create(a)
	33	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_setdetach_np(a,s)
6dc3770d	34	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
0d85d877	35	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
0d85d877	36	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
9bbd4fab	37	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
0d85d877	38	# endif
2eb25c99	39	# if defined(__hpux) && defined(__ux_version) && __ux_version <= 1020
	40	# define pthread_attr_init(a) pthread_attr_create(a)
	41	/* XXX pthread_setdetach_np() missing in DCE threads on HP-UX 10.20 */
10617789	42	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) (0)
2eb25c99	43	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,a,s,d)
	44	# define pthread_key_create(k,d) pthread_keycreate(k,(pthread_destructor_t)(d))
	45	# define pthread_mutexattr_init(a) pthread_mutexattr_create(a)
	46	# define pthread_mutexattr_settype(a,t) pthread_mutexattr_setkind_np(a,t)
	47	# endif
0d85d877	48	# if defined(DJGPP) \|\| defined(__OPEN_VM)
	49	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,&(s))
	50	# define YIELD pthread_yield(NULL)
	51	# endif
0d85d877	52	# endif
2eb25c99	53	# if !defined(__hpux) \|\| !defined(__ux_version) \|\| __ux_version > 1020
1cfa4ec7	54	# define pthread_mutexattr_default NULL
0d85d877	55	# define pthread_condattr_default NULL
2eb25c99	56	# endif
0d85d877	57	#endif
	58
	59	#ifndef PTHREAD_CREATE
	60	/* You are not supposed to pass NULL as the 2nd arg of PTHREAD_CREATE(). */
	61	# define PTHREAD_CREATE(t,a,s,d) pthread_create(t,&(a),s,d)
	62	#endif
	63
	64	#ifndef PTHREAD_ATTR_SETDETACHSTATE
	65	# define PTHREAD_ATTR_SETDETACHSTATE(a,s) pthread_attr_setdetachstate(a,s)
d55594ae	66	#endif
1cfa4ec7	67
ef4af2be	68	#ifndef PTHREAD_CREATE_JOINABLE
	69	# ifdef OLD_PTHREAD_CREATE_JOINABLE
	70	# define PTHREAD_CREATE_JOINABLE OLD_PTHREAD_CREATE_JOINABLE
	71	# else
	72	# define PTHREAD_CREATE_JOINABLE 0 /* Panic? No, guess. */
	73	# endif
	74	#endif
	75
5cbe9849	76	#ifdef DGUX
	77	# define THREAD_CREATE_NEEDS_STACK (16*1024)
	78	#endif
	79
7f3d1cf1	80	#ifdef I_MACH_CTHREADS
	81
	82	/* cthreads interface */
	83
	84	/* #include <mach/cthreads.h> is in perl.h #ifdef I_MACH_CTHREADS */
	85
ba869deb	86	#define MUTEX_INIT(m) \
	87	STMT_START { \
	88	*m = mutex_alloc(); \
	89	if (*m) { \
	90	mutex_init(*m); \
	91	} else { \
efc57feb	92	Perl_croak_nocontext("panic: MUTEX_INIT"); \
ba869deb	93	} \
	94	} STMT_END
	95
	96	#define MUTEX_LOCK(m) mutex_lock(*m)
ba869deb	97	#define MUTEX_UNLOCK(m) mutex_unlock(*m)
ba869deb	98	#define MUTEX_DESTROY(m) \
	99	STMT_START { \
	100	mutex_free(*m); \
	101	*m = 0; \
	102	} STMT_END
	103
	104	#define COND_INIT(c) \
	105	STMT_START { \
	106	*c = condition_alloc(); \
	107	if (*c) { \
	108	condition_init(*c); \
	109	} \
	110	else { \
efc57feb	111	Perl_croak_nocontext("panic: COND_INIT"); \
ba869deb	112	} \
ba869deb	113	} STMT_END
7f3d1cf1	114
	115	#define COND_SIGNAL(c) condition_signal(*c)
	116	#define COND_BROADCAST(c) condition_broadcast(*c)
	117	#define COND_WAIT(c, m) condition_wait(c, m)
ba869deb	118	#define COND_DESTROY(c) \
	119	STMT_START { \
	120	condition_free(*c); \
	121	*c = 0; \
	122	} STMT_END
7f3d1cf1	123
	124	#define THREAD_CREATE(thr, f) (thr->self = cthread_fork(f, thr), 0)
	125	#define THREAD_POST_CREATE(thr)
	126
	127	#define THREAD_RET_TYPE any_t
	128	#define THREAD_RET_CAST(x) ((any_t) x)
	129
	130	#define DETACH(t) cthread_detach(t->self)
	131	#define JOIN(t, avp) ((avp) = (AV )cthread_join(t->self))
	132
ba869deb	133	#define PERL_SET_CONTEXT(t) cthread_set_data(cthread_self(), t)
ba869deb	134	#define PERL_GET_CONTEXT cthread_data(cthread_self())
7f3d1cf1	135
	136	#define INIT_THREADS cthread_init()
	137	#define YIELD cthread_yield()
ba869deb	138	#define ALLOC_THREAD_KEY NOOP
e1b5da64	139	#define FREE_THREAD_KEY NOOP
7f3d1cf1	140	#define SET_THREAD_SELF(thr) (thr->self = cthread_self())
	141
	142	#endif /* I_MACH_CTHREADS */
	143
1cfa4ec7	144	#ifndef YIELD
e7a4f449	145	# ifdef SCHED_YIELD
	146	# define YIELD SCHED_YIELD
	147	# else
	148	# ifdef HAS_SCHED_YIELD
	149	# define YIELD sched_yield()
	150	# else
	151	# ifdef HAS_PTHREAD_YIELD
	152	/* pthread_yield(NULL) platforms are expected
	153	* to have #defined YIELD for themselves. */
	154	# define YIELD pthread_yield()
	155	# endif
	156	# endif
	157	# endif
9731c6ca	158	#endif
11343788	159
227c31c3	160	#ifdef __hpux
	161	# define MUTEX_INIT_NEEDS_MUTEX_ZEROED
	162	#endif
	163
ea0efc06	164	#ifndef MUTEX_INIT
ba869deb	165
ba869deb	166	# ifdef MUTEX_INIT_NEEDS_MUTEX_ZEROED
227c31c3	167	/* Temporary workaround, true bug is deeper. --jhi 1999-02-25 */
ba869deb	168	# define MUTEX_INIT(m) \
227c31c3	169	STMT_START { \
	170	Zero((m), 1, perl_mutex); \
	171	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
efc57feb	172	Perl_croak_nocontext("panic: MUTEX_INIT"); \
227c31c3	173	} STMT_END
ba869deb	174	# else
ba869deb	175	# define MUTEX_INIT(m) \
ea0efc06	176	STMT_START { \
ea0efc06	177	if (pthread_mutex_init((m), pthread_mutexattr_default)) \
efc57feb	178	Perl_croak_nocontext("panic: MUTEX_INIT"); \
ea0efc06	179	} STMT_END
ba869deb	180	# endif
	181
	182	# define MUTEX_LOCK(m) \
	183	STMT_START { \
	184	if (pthread_mutex_lock((m))) \
ba869deb	185	Perl_croak_nocontext("panic: MUTEX_LOCK"); \
cea2e8a9	186	} STMT_END
ba869deb	187
efc57feb	188	# define MUTEX_UNLOCK(m) \
ba869deb	189	STMT_START { \
	190	if (pthread_mutex_unlock((m))) \
	191	Perl_croak_nocontext("panic: MUTEX_UNLOCK"); \
ea0efc06	192	} STMT_END
ba869deb	193
	194	# define MUTEX_DESTROY(m) \
	195	STMT_START { \
	196	if (pthread_mutex_destroy((m))) \
efc57feb	197	Perl_croak_nocontext("panic: MUTEX_DESTROY"); \
ea0efc06	198	} STMT_END
	199	#endif /* MUTEX_INIT */
	200
	201	#ifndef COND_INIT
ba869deb	202	# define COND_INIT(c) \
ea0efc06	203	STMT_START { \
ea0efc06	204	if (pthread_cond_init((c), pthread_condattr_default)) \
efc57feb	205	Perl_croak_nocontext("panic: COND_INIT"); \
ea0efc06	206	} STMT_END
ba869deb	207
	208	# define COND_SIGNAL(c) \
	209	STMT_START { \
	210	if (pthread_cond_signal((c))) \
efc57feb	211	Perl_croak_nocontext("panic: COND_SIGNAL"); \
ea0efc06	212	} STMT_END
ba869deb	213
	214	# define COND_BROADCAST(c) \
	215	STMT_START { \
	216	if (pthread_cond_broadcast((c))) \
efc57feb	217	Perl_croak_nocontext("panic: COND_BROADCAST"); \
ea0efc06	218	} STMT_END
ba869deb	219
	220	# define COND_WAIT(c, m) \
	221	STMT_START { \
	222	if (pthread_cond_wait((c), (m))) \
efc57feb	223	Perl_croak_nocontext("panic: COND_WAIT"); \
ea0efc06	224	} STMT_END
ba869deb	225
	226	# define COND_DESTROY(c) \
	227	STMT_START { \
	228	if (pthread_cond_destroy((c))) \
efc57feb	229	Perl_croak_nocontext("panic: COND_DESTROY"); \
ea0efc06	230	} STMT_END
ea0efc06	231	#endif /* COND_INIT */
33f46ff6	232
f826a10b	233	/* DETACH(t) must only be called while holding t->mutex */
ea0efc06	234	#ifndef DETACH
ba869deb	235	# define DETACH(t) \
	236	STMT_START { \
	237	if (pthread_detach((t)->self)) { \
	238	MUTEX_UNLOCK(&(t)->mutex); \
efc57feb	239	Perl_croak_nocontext("panic: DETACH"); \
ba869deb	240	} \
ea0efc06	241	} STMT_END
ea0efc06	242	#endif /* DETACH */
33f46ff6	243
ea0efc06	244	#ifndef JOIN
ba869deb	245	# define JOIN(t, avp) \
	246	STMT_START { \
	247	if (pthread_join((t)->self, (void**)(avp))) \
efc57feb	248	Perl_croak_nocontext("panic: pthread_join"); \
ea0efc06	249	} STMT_END
	250	#endif /* JOIN */
	251
0953243c	252	/* Use an unchecked fetch of thread-specific data instead of a checked one.
	253	* It would fail if the key were bogus, but if the key were bogus then
	254	* Really Bad Things would be happening anyway. --dan */
026b9da6	255	#if (defined(__ALPHA) && (__VMS_VER >= 70000000)) \|\| \
8b8b35ab	256	(defined(__alpha) && defined(__osf__)) /* Available only on >= 4.0 */
	257	# define HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP /* Configure test needed */
	258	#endif
	259
	260	#ifdef HAS_PTHREAD_UNCHECKED_GETSPECIFIC_NP
	261	# define PTHREAD_GETSPECIFIC(key) pthread_unchecked_getspecific_np(key)
	262	#else
	263	# define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key)
	264	#endif
	265
	266	#ifndef PERL_GET_CONTEXT
	267	# define PERL_GET_CONTEXT PTHREAD_GETSPECIFIC(PL_thr_key)
ba869deb	268	#endif
	269
	270	#ifndef PERL_SET_CONTEXT
	271	# define PERL_SET_CONTEXT(t) \
	272	STMT_START { \
	273	if (pthread_setspecific(PL_thr_key, (void *)(t))) \
efc57feb	274	Perl_croak_nocontext("panic: pthread_setspecific"); \
ea0efc06	275	} STMT_END
ba869deb	276	#endif /* PERL_SET_CONTEXT */
ea0efc06	277
1feb2720	278	#ifndef INIT_THREADS
	279	# ifdef NEED_PTHREAD_INIT
	280	# define INIT_THREADS pthread_init()
	281	# endif
0d85d877	282	#endif
ea0efc06	283
ba869deb	284	#ifndef ALLOC_THREAD_KEY
	285	# define ALLOC_THREAD_KEY \
	286	STMT_START { \
c44d3fdb	287	if (pthread_key_create(&PL_thr_key, 0)) { \
7bd161a1	288	PerlIO_printf(PerlIO_stderr(), "panic: pthread_key_create"); \
c44d3fdb	289	exit(1); \
c44d3fdb	290	} \
ba869deb	291	} STMT_END
	292	#endif
	293
e1b5da64	294	#ifndef FREE_THREAD_KEY
	295	# define FREE_THREAD_KEY \
	296	STMT_START { \
	297	pthread_key_delete(PL_thr_key); \
	298	} STMT_END
	299	#endif
	300
1feb2720	301	#ifndef THREAD_RET_TYPE
	302	# define THREAD_RET_TYPE void *
	303	# define THREAD_RET_CAST(p) ((void *)(p))
	304	#endif /* THREAD_RET */
	305
	306	#if defined(USE_THREADS)
	307
940cb80d	308	/* Accessor for per-thread SVs */
1feb2720	309	# define THREADSV(i) (thr->threadsvp[i])
940cb80d	310
	311	/*
	312	* LOCK_SV_MUTEX and UNLOCK_SV_MUTEX are performance-critical. Here, we
	313	* try only locking them if there may be more than one thread in existence.
	314	* Systems with very fast mutexes (and/or slow conditionals) may wish to
	315	* remove the "if (threadnum) ..." test.
b099ddc0	316	* XXX do NOT use C<if (PL_threadnum) ...> -- it sets up race conditions!
940cb80d	317	*/
1feb2720	318	# define LOCK_SV_MUTEX MUTEX_LOCK(&PL_sv_mutex)
	319	# define UNLOCK_SV_MUTEX MUTEX_UNLOCK(&PL_sv_mutex)
	320	# define LOCK_STRTAB_MUTEX MUTEX_LOCK(&PL_strtab_mutex)
	321	# define UNLOCK_STRTAB_MUTEX MUTEX_UNLOCK(&PL_strtab_mutex)
	322	# define LOCK_CRED_MUTEX MUTEX_LOCK(&PL_cred_mutex)
	323	# define UNLOCK_CRED_MUTEX MUTEX_UNLOCK(&PL_cred_mutex)
4755096e	324	# define LOCK_FDPID_MUTEX MUTEX_LOCK(&PL_fdpid_mutex)
4755096e	325	# define UNLOCK_FDPID_MUTEX MUTEX_UNLOCK(&PL_fdpid_mutex)
631cfb58	326	# define LOCK_SV_LOCK_MUTEX MUTEX_LOCK(&PL_sv_lock_mutex)
631cfb58	327	# define UNLOCK_SV_LOCK_MUTEX MUTEX_UNLOCK(&PL_sv_lock_mutex)
11343788	328
33f46ff6	329	/* Values and macros for thr->flags */
605e5515	330	#define THRf_STATE_MASK 7
	331	#define THRf_R_JOINABLE 0
	332	#define THRf_R_JOINED 1
	333	#define THRf_R_DETACHED 2
	334	#define THRf_ZOMBIE 3
	335	#define THRf_DEAD 4
f93b4edd	336
458fb581	337	#define THRf_DID_DIE 8
07b73707	338
f826a10b	339	/* ThrSTATE(t) and ThrSETSTATE(t) must only be called while holding t->mutex */
458fb581	340	#define ThrSTATE(t) ((t)->flags & THRf_STATE_MASK)
f93b4edd	341	#define ThrSETSTATE(t, s) STMT_START { \
605e5515	342	(t)->flags &= ~THRf_STATE_MASK; \
33f46ff6	343	(t)->flags \|= (s); \
bf49b057	344	DEBUG_S(PerlIO_printf(Perl_debug_log, \
605e5515	345	"thread %p set to state %d\n", (t), (s))); \
f93b4edd	346	} STMT_END
	347
	348	typedef struct condpair {
f826a10b	349	perl_mutex mutex; /* Protects all other fields */
	350	perl_cond owner_cond; /* For when owner changes at all */
	351	perl_cond cond; /* For cond_signal and cond_broadcast */
	352	Thread owner; /* Currently owning thread */
f93b4edd	353	} condpair_t;
	354
	355	#define MgMUTEXP(mg) (&((condpair_t *)(mg->mg_ptr))->mutex)
	356	#define MgOWNERCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->owner_cond)
	357	#define MgCONDP(mg) (&((condpair_t *)(mg->mg_ptr))->cond)
	358	#define MgOWNER(mg) ((condpair_t *)(mg->mg_ptr))->owner
	359
11343788	360	#endif /* USE_THREADS */
1feb2720	361	#endif /* USE_THREADS \|\| USE_ITHREADS */
	362
	363	#ifndef MUTEX_LOCK
	364	# define MUTEX_LOCK(m)
	365	#endif
	366
1feb2720	367	#ifndef MUTEX_UNLOCK
	368	# define MUTEX_UNLOCK(m)
	369	#endif
1feb2720	370
	371	#ifndef MUTEX_INIT
	372	# define MUTEX_INIT(m)
	373	#endif
	374
	375	#ifndef MUTEX_DESTROY
	376	# define MUTEX_DESTROY(m)
	377	#endif
	378
	379	#ifndef COND_INIT
	380	# define COND_INIT(c)
	381	#endif
	382
	383	#ifndef COND_SIGNAL
	384	# define COND_SIGNAL(c)
	385	#endif
	386
	387	#ifndef COND_BROADCAST
	388	# define COND_BROADCAST(c)
	389	#endif
	390
	391	#ifndef COND_WAIT
	392	# define COND_WAIT(c, m)
	393	#endif
	394
	395	#ifndef COND_DESTROY
	396	# define COND_DESTROY(c)
	397	#endif
	398
	399	#ifndef LOCK_SV_MUTEX
	400	# define LOCK_SV_MUTEX
	401	#endif
	402
	403	#ifndef UNLOCK_SV_MUTEX
	404	# define UNLOCK_SV_MUTEX
	405	#endif
	406
	407	#ifndef LOCK_STRTAB_MUTEX
	408	# define LOCK_STRTAB_MUTEX
	409	#endif
	410
	411	#ifndef UNLOCK_STRTAB_MUTEX
	412	# define UNLOCK_STRTAB_MUTEX
	413	#endif
	414
	415	#ifndef LOCK_CRED_MUTEX
	416	# define LOCK_CRED_MUTEX
	417	#endif
	418
	419	#ifndef UNLOCK_CRED_MUTEX
	420	# define UNLOCK_CRED_MUTEX
	421	#endif
	422
4755096e	423	#ifndef LOCK_FDPID_MUTEX
	424	# define LOCK_FDPID_MUTEX
	425	#endif
	426
	427	#ifndef UNLOCK_FDPID_MUTEX
	428	# define UNLOCK_FDPID_MUTEX
	429	#endif
	430
631cfb58	431	#ifndef LOCK_SV_LOCK_MUTEX
	432	# define LOCK_SV_LOCK_MUTEX
	433	#endif
	434
	435	#ifndef UNLOCK_SV_LOCK_MUTEX
	436	# define UNLOCK_SV_LOCK_MUTEX
	437	#endif
	438
ba869deb	439	/* THR, SET_THR, and dTHR are there for compatibility with old versions */
1feb2720	440	#ifndef THR
ba869deb	441	# define THR PERL_GET_THX
	442	#endif
	443
	444	#ifndef SET_THR
	445	# define SET_THR(t) PERL_SET_THX(t)
1feb2720	446	#endif
	447
	448	#ifndef dTHR
	449	# define dTHR dNOOP
	450	#endif
	451
	452	#ifndef INIT_THREADS
	453	# define INIT_THREADS NOOP
	454	#endif